Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1530a7e6d1a2c69…

MALICIOUS

PDF

86.7 KB Created: 2021-09-01 19:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a65705432dbc9584f4a1b73f255365fd SHA-1: 6673f89d726a6bfa315d9efae132bac16c486ed1 SHA-256: d1530a7e6d1a2c6979bbe04f54c366a13ab07d34895e66b1e0ab9192a254c22c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS upload directories. The presence of numerous links on disposable hosting further suggests a malicious intent to distribute potentially harmful content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://chickenwild.com/upload/contents/images/images/69432091244.pdf In PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/161061d85b5cf2---47747517712.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072b1f6a636e---97097509732.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43b5fcf44a---likegewilogenuluvebugada.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/43654032419.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/texonarisozizubededijuka.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/51b678a859067381e776063f7e4b38c0/nediki.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/pifiwabusunizadapemifiw.pdfIn PDF document text
    • http://eternoohydro.com/d/files/puwokon.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/81829663738.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/4c17501eddaf258c1665529c36d18ed5/45473904919.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1611855c7af66f---22893512970.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8408929575---91878673243.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/4hcu4j3vmd8st95hhevj2t7sjs/texexofatabisegifunekani.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/jhrsf307ot3k6q2pkot1sit8lt/1159071915.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210529_FE7E88AC3DE60224.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/66937977448.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8040af608---dasifoliwefatujederud.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/xemomotemegikowenola.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088dd4a850b3---lufezoxuxagagevabu.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/vamimogeritukuvekone.pdfIn PDF document text
    • https://stauber.lt/images/files/3634066705.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a9cb1baf0---kakeba.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606f68a37e70f---86185915746.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/bf32a52aea0dd4ba6f872a21475e2d24/favixijemu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=dissected+meaning+in+malayalamPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C8 10608 bytes
SHA-256: 069f39939f84a7bdfbe2327e32c389d9ad46a78c5dab15e874d63b6b369243a5
font_02_sfnt_off000119d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D2 19608 bytes
SHA-256: e2d4df9136cf9b05031be7a30cae24fd09bbda4610257d3f6aec4e215b202357

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